Article

AIM: To better understand the neural and performance factors that may underlie
developmental coordination disorder (DCD), and implications for a multi-component
account. METHOD: A systematic review of the experimental literature published
between June 2011 and September 2016 was conducted using a modified PICOS
(population, intervention, comparison, outcomes, and study type) framework. A
total of 106 studies were included. RESULTS: Behavioural data from 91 studies
showed a broad cluster of deficits in the anticipatory control of movement, basic
processes of motor learning, and cognitive control. Importantly, however,
performance issues in DCD were often shown to be moderated by task type and
difficulty. As well, we saw new evidence of compensatory processes and strategies
in several studies. Neuroimaging data (15 studies, including
electroencephalography) showed reduced cortical thickness in the right medial
orbitofrontal cortex and altered brain activation patterns across functional
networks involving prefrontal, parietal, and cerebellar regions in children with
DCD than those in comparison groups. Data from diffusion-weighted magnetic
resonance imaging suggested reduced white matter organization involving
sensorimotor structures and altered structural connectivity across the whole
brain network. INTERPRETATION: Taken together, results support the hypothesis
that children with DCD show differences in brain structure and function compared
with typically developing children. Behaviourally, these differences may affect
anticipatory planning and reduce automatization of movement skill, prompting
greater reliance on slower feedback-based control and compensatory strategies.
Implications for future research, theory development, and clinical practice are
discussed.
CI - (c) 2017 Mac Keith Press.

Langue : ANGLAIS